Measurement of Υ(1<i>S</i>) Elliptic Flow at Forward Rapidity in Pb-Pb Collisions at √s<i><sub>NN</sub></i>=5.02 TeV



Acharya, S, Adamova, D, Adhya, SP, Adler, A, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z
et al (show 1022 more authors) (2019) Measurement of Υ(1<i>S</i>) Elliptic Flow at Forward Rapidity in Pb-Pb Collisions at √s<i><sub>NN</sub></i>=5.02 TeV. PHYSICAL REVIEW LETTERS, 123 (19). 192301-.

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Abstract

The first measurement of the ϒ(1S) elliptic flow coefficient (v_{2}) is performed at forward rapidity (2.5<y<4) in Pb-Pb collisions at sqrt[s_{NN}]=5.02  TeV with the ALICE detector at the LHC. The results are obtained with the scalar product method and are reported as a function of transverse momentum (p_{T}) up to 15  GeV/c in the 5%-60% centrality interval. The measured ϒ(1S)v_{2} is consistent with 0 and with the small positive values predicted by transport models within uncertainties. The v_{2} coefficient in 2<p_{T}<15  GeV/c is lower than that of inclusive J/ψ mesons in the same p_{T} interval by 2.6 standard deviations. These results, combined with earlier suppression measurements, are in agreement with a scenario in which the ϒ(1S) production in Pb-Pb collisions at LHC energies is dominated by dissociation limited to the early stage of the collision, whereas in the J/ψ case there is substantial experimental evidence of an additional regeneration component.

Item Type: Article
Uncontrolled Keywords: A Large Ion Collider Experiment Collaboration
Depositing User: Symplectic Admin
Date Deposited: 05 Feb 2020 11:25
Last Modified: 19 Oct 2023 16:52
DOI: 10.1103/PhysRevLett.123.192301
Open Access URL: http://doi.org/10.1103/PhysRevLett.123.192301
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3073586